Ireland's Speaking Clock service, established almost five decades ago, has hung up the receiver for the final time.
The 1191 number ceased operations from Monday morning.
At its peak, the service attracted close to three million calls a year.
In a statement, eir says: "Technology has moved on and the proliferation of mobile phones and gadgets has caused a steady, predictable decline in the numbers of people using the service.
"Although the 1191 number still receives calls daily, it's a very small number that does not justify maintaining the system."
In honour of the #SpeakingClock "calling time" on its services today, here's a graph showing online searches in Ireland for “speaking clock” vs. “what time is it?" since 2004. It tells a bit of a story. pic.twitter.com/13X9nqGOHT
— The Friday Agency (@FridayAgency) August 27, 2018
The company adds that it began to let users calling the service know six months ago that it would close on Monday August 27th.
The format used was a message at 10 second intervals, which told callers: "At the signal it will be, HH:MM and XX seconds" followed by a beep.
The Belfast Telegraph has reported the number of people calling had fallen by 99% in 2010.
In comparison, BT's 123 talking clock in the UK received around 60 million calls in 2009.